This work is a revised and corrected version of the authors’ joint paper with T. Constantinescu (Trans Am Math Soc 355:813–836, 2003). Some of the theorems from the original paper that are withdrawn are recast as new open problems for indefinite interpolation. Partial results are obtained by other methods, including Kronecker’s theorem for Hankel operators.
Alpay, D., Dijksma, A. & Rovnyak, J. On Nudel’man’s Problem and Indefinite Interpolation in the Generalized Schur and Nevanlinna Classes. Complex Anal. Oper. Theory 14, 25 (2020). https://doi.org/10.1007/s11785-019-00966-3